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Titolo:
Micro-segregation, molecular shape and molecular topology partners for thedesign of liquid crystalline materials with complex mesophase morphologies
Autore:
Tschierske, C;
Indirizzi:
Univ Halle Wittenberg, Inst Organ Chem, D-06120 Halle Saale, Germany Univ Halle Wittenberg Halle Saale Germany D-06120 0 Halle Saale, Germany
Titolo Testata:
JOURNAL OF MATERIALS CHEMISTRY
fascicolo: 11, volume: 11, anno: 2001,
pagine: 2647 - 2671
SICI:
0959-9428(2001)11:11<2647:MMSAMT>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABC TRIBLOCK COPOLYMERS; X-RAY-DIFFRACTION; SPHERICAL SUPRAMOLECULAR DENDRIMERS; TRANSITION-METAL COMPLEXES; LATERALLY CONNECTED TWINS; ROD-COIL MOLECULES; PERFLUORINATED TERMINAL CHAINS; SWALLOW-TAILED COMPOUNDS; MICELLAR CUBIC PHASES; MOLAR-MASS ANALOGS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
267
Recensione:
Indirizzi per estratti:
Indirizzo: Tschierske, C Univ Halle Wittenberg, Inst Organ Chem, Kurt Mothes Str 2, D-06120 Halle Saale, Germany Univ Halle Wittenberg Kurt Mothes Str 2 Halle Saale Germany D-06120
Citazione:
C. Tschierske, "Micro-segregation, molecular shape and molecular topology partners for thedesign of liquid crystalline materials with complex mesophase morphologies", J MAT CHEM, 11(11), 2001, pp. 2647-2671

Abstract

This article gives an overview of recent progress in the design of novel materials, capable of forming liquid crystalline phases with non-conventional mesophase morphologies. The materials include dendritic molecules, ternary block-copolymers, rod-coil molecules and linear as well as non-linear polyphilic low molecular weight block molecules incorporating rigid segments with a specific shape. Changing the shape of the rigid segments from rod-like to disc-like or to a bent shape leads to additional possibilities for thedirected design of mesophase forming materials. Many of these molecules are able to form quite unusual mesophase morphologies, distinct from the conventional lamellar (smectic) and columnar mesophases of classical rod-like and disc-like liquid crystals; they include mesophases which combine lamellar and columnar organisation, columnar mesophases incorporating three discrete sets of columns, biaxial smectic phases, such as the SmA(b)-phase (McMillan Phase), polar smectic phases and nonconventional layer structures in which rigid units are aligned parallel to the layers. These novel mesophase morphologies were realised by increasing the number of incompatible units combined in these molecules, by changing the volume fractions of the incompatible segments, by tailoring the shape of rigid segments and by controlling the molecular topology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 18:21:07